Mechanical movement.



No. 668,958. Patsntsd Fb. 26,191".

- J. E; HALETT.

MECHANICAL MOVEMENT. Application Hled A x- 1B 19 Renewe'd Jan. 31, 1901(No Model.)

2 Sheats$heet l..

ttozmg y N0. 668,958. Patented Feb. 26, |90l. J. E. HALLETT..

MECHANICAL MOVEMENT.

(Application Bled Apr. 13, 1900. Renewed Jan. 31, 1901.;

(No Model.) 2 SheetsfSheet 2.

flttozwu rrhh JOHN E. HALLETT, OF SAO CITY, IOWA.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 668,958, dated February26, 1901. Application filed April 13,1900. Renewed January 31, 190]..Serial No. 45,511. (No model.)

To all whom, it may concern."

Beit known that I, JOHN E. HALLETT, a citizen of the United States,residing at Sac City, in the county of Sac and State of Iowa, haveinvented certain new and useful Improvements in Mechanical Movements, ofwhich the following is a specification.

This invention relates to a new and useful mechanical movementespecially adapted for use upon velocipedes and other vehicles; and itsprimary object is to provide a device of simple construction wherebypower may be transmitted to a shaft continuously and positively.

To these ends the invention consists in providing a lever pivotallysecured to a link which is suspended from a suitable support, and saidleveris provided with a toothed slot, within which is mounted a gearadapted to mesh with the teeth upon the sides and ends of the slotsuccessively and automatically.

The invention also consists in providing means of novel constructionwhereby said lever is swung backward and forward and held in suchposition until reaching the limit of the up and down strokes,respectively.

The invention also consists in the further novel construction andcombination of parts hereinafter more fully described and claimed, andillustrated in the accompanying drawings, showing the preferred form ofmy invention, and in which- Figure 1 is a side elevation of the device.Fig. 2 is a plan view thereof. Fig. 3 is an end view. Fig. 4 is a detailview of the le ver. Fig. 5 is asimilar view of the gear, and Fig. 6 is aside elevation of the device applied to a bicycle.

Referring to said figures by numerals of reference, 1 is a lever ofAsuitable construction having a stud 2 projecting therefrom at a pointbetween its ends and pivotally mounted within the lower end of a link 3,which is pivoted to and suspended from a suitable support 4. One end ofthe lever 1 is enlarged, as shown at and is provided with a slot 6,having teeth 7 projecting from its sides and ends, said teeth meshingwith teeth formed upon the gear S, which is secured to the shaft 9 of awheel 10 o'r other suitable driving mechanism. The gear is provided atone side with an annular groove 11, which is adapted to receive thewalls of a slot 12,

formed within a plate 12,and which is slightly smaller than, butconcentric to,the slot 6, said plate being secured to the enlargedportion 5 of the lever 1. to a point adjacent to the inner wall of theslot 6 is a cam 13, upon which is adapted to bear a piu 14, whichprojects from the inner face of the lever 1.

In operation it will be seen that when the lever 1 is pressed downwardthe teeth upon one of the walls of the slot G, which engage with thegear Within said slot, will cause said gear to revolve. When the gearreaches the end wall of the slot, it will engage with the teeth thereofand force the lever backward or forward, according to the direction inwhich the shaft is revolving, thereby drawing the pin 14 over the end ofthe cam 13, which will guide the same in its upward and downwardmovement and hold the teeth of the slot into engagement with the gear.By means of the groove 11 and the plate fitting therein lateral movementof the lever is prevented and the same is held at all times iuengagement with the gear. It will be understood that when the said leveris thrown backward and forward by means of the cam 13 it will swing uponthe link as a pivot.

In the foregoing description I have shown the preferred form of myinvention; butIdo not limit myself thereto, as I am aware thatmodifications may be made without departing from the spirit orsacrificing the advantages thereof, and I therefore reserve the right tomake such changes as fairly fall within the scope of my invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

The combination withasupport,of acam secured thereto, a link pivoted tothe support, a lever mounted upon the link and having a toothed slottherein, a shaft within the slot, a gear thereon meshing with the teethof the slot, said gear having an annular groove, and aslotted plate secured to the lever and mounted within said groove.

In testimony whereof I ax my signature in presence of two witnesses.

J OI-IN E. HALLET'I.

Witnesses:

E. N. BAILY, J. Y. CAMPFIELD.

Projecting from the support 4Q IOO

